神经网络预报低温铝电解的电流效率

用Ｎａ３ＡｌＦ６－ＡｌＦ３－ＣａＦ２－ＭｇＦ２－ＬｉＦ－Ａｌ２Ｏ３体系中的低摩尔比（ｎ（ＮａＦ）／ｎ（ＡｌＦ３））电解质进行低温电解实验，以大量的实验数据为学习样本，让网络学习以建立各种电解条件与对应电流效率间的非线性映射，用来预报不同电解条件下的电流效率，研究了各种电解工艺参数对电流效率的影响规律。     

Bi2S3矿浆电解热力学

由Ｂｉ２Ｓ３在ＮａＣｌ溶液中的溶解度,Ｂｉ２Ｓ３－Ｃｌ－Ｈ２Ｏ系的电位－ｐＨ,电位－ｌｇ「Ｃｌ」图分析表明：Ｂｉ２Ｓ３矿在氯盐水溶液中的溶解度有了很大的提高,在矿浆电解时它同时存在三种浸出机理。即 １．化学溶解,Ｂｉ２Ｓ３（Ｓ）＋３ｎＣｌ（ａｑ）＋６Ｈ（ａｑ）＾＋＝２ＢｉＣｌ＾３－ｎｎ（ａｑ）＋３Ｈ２Ｓ＾０（ａｑ） ２．化学氧化。Ｂｉ２（３Ｓ）＋６Ｆｅ＾３＋（ａｑ２）＋２ｎＣｌ＾－（ａｑ）＝６Ｆｅ     

KF－AlF_3系热力学性质的计算

在ＫＦ－ＡｌＦ３熔体中采用络合离子逐级分解的模式，利用亚晶格溶液模型计算了ＫＦ－ＡｌＦ３熔体中的逐级解离常数和分解能。分解常数依次为ｋ１＝１．５５×１０－１，ｌ２＝４．２０×１０－２，ｋ３＝７．０１×１０－３；分解热依次为Ｈ１＝３７．８ｋＪ／ｍｏｌ，Ｈ２＝４８．２ｋＪ／ｍｏｌ，Ｈ３＝１２２．ｌｋＪ／ｍｏｌ，计算结果表明ＫＦ－ＡｌＦ３熔体中时比ＮａＦ－ＡｌＦ３和ＬｉＦ－ＡｌＦ３熔体中的都更稳定。本文还对ＫＦ－ＡｌＦ３熔体中各组成的摩尔浓度及其它混合热力学性质进行了计算，计算结果与实验测得结果吻合的较好。     

含钾冰晶石熔体电导率的估算

利用简单模型、串联模型和并联模型分别估算Ｋ３ＡｌＦ６－Ｎａ３ＡｌＦ６和Ｋ３ＡｌＦ６－Ｌｉ３ＡｌＦ６二元系的电导率，发现在添加剂浓度较低时，简单模型能够得到较好的结果。据此我们预测了一些常用的添加剂如ＮａＣｌ、ＬｉＦ、ＡｌＦ３、Ａｌ２Ｏ，ＭｇＦ２和ＣａＦ２等对钾冰晶石熔体电导率的影响，并进一步利用简单模型推算Ｋ３ＡｌＦ６－ＡｌＦ３－ＬｉＦ三元系在一些温度截面的电导率。     

电沉积Ti—Al合金粉粒度和含铝量的研究

本文研究以废钛和铝为单金属分挂可溶阳极时，在ＮａＣｌ－ＫＣｌ－ＮａＦ－ＴｉＣｌｎ－ＡｌＣｌ３熔盐体系钛、铝共沉积过程中，含铝量与析出Ｔｉ－Ａｌ合金粉粒度的关系，探讨制取含铝量较高的中等粒度合金粉的可能性。此外，还研究了熔盐中加入ＮａＦ及钛、铝离子浓度、温度、电流密度对共电沉积Ｔｉ－Ａｌ合金粉（－０６３～＋００８ｍｍ）中含铝量的影响     

伟晶状红柱石选矿工艺试验研究

伟晶状红柱石矿石属难选矿石。脉石密度大，且比磁化系数低．矿石经过预选、重选（摇床）、强磁选作业，可以生产符合标准要求的三个粒级红柱石精矿：－３．２＋１．６ｍｍ，Ａｌ＿２Ｏ＿３５７．０１％，Ｆｅ＿２Ｏ＿３０．７４％；－１．６＋０．５ｍｍ，Ａｌ＿２Ｏ＿３５７．４２％，Ｆｅ＿２Ｏ＿３０．５８％；－０．５ｍｍ，Ａｌ＿２Ｏ＿３５６．４５％，Ｆｅ＿２Ｏ＿３０．４２％。各种类型强磁选机工业和半工业试验表明，ＣＰＲ－６型于式双盘电磁强磁选机优于其它类型强磁选机，能获得低铁高铝红柱石精矿，且回收率高。试验研究中同时解决了细粒级红柱石不易回收的选矿工艺问题。     

从煤灰中提炼氧化铝

从煤灰中提炼氧化铝煤灰中一般含有Ａｌ２Ｏ３２５％～３０％，部分高铝的煤灰含Ａｌ２Ｏ３高于４０％，可以用烧结法提炼氧化铝。将磨细过０．５ｍｍ筛的煤灰（１份，本研究用煤灰含Ａｌ２Ｏ３３６．５８％）、石灰（１．６份）混和均匀，做成球状、晒干，于竖式土窑内以...     

4-氨基吡啶树脂吸附铬(Ⅵ)的研究

４－氨基吡啶树脂（４－ＡＰＲ）对Ｃｒ（Ⅵ）的吸附在ｐＨ＝２时最佳,静态饱和吸附容量１６３．６ｍｇＣｒ（Ⅵ）／ｇ树脂,用４．５ｍｏｌ　Ｌ－１ ＮａＯＨ溶液能洗脱。测得２９８Ｋ时表观吸附速率常数ｋ２９８＝６．２５×１０－４Ｓ－Ｉ．等温吸附遵循Ｆｒｅｕｎｄｌｉｃｈ曲线,吸附机理表明４－ＡＰＲ功能上的Ｎ与Ｃｒ（Ⅵ）发生配位键合,配位摩尔比为１：１。     

高灵敏度卟啉试剂常温显色的研究及应用─不经分离用TPPS_4测定高纯铅中的铜

提出了一种常温下用水溶性卟啉ＴＰＰＳ_４测定铜的高灵敏度分光光度法。在ｐＨ４．５～６．０的ＨＡｃ－ＮａＡｃ缓冲溶液中，在抗坏血酸存在下，铜与ＴＰＰＳ_４形成１：１的络合物，其稳定常数为Ｋ稳＝１．４×１０~８，λ_（ｍａｘ）＝４１２ｎｍ，ε_（４１２）＝３．９×１０~５ｃｍ~（－１）·ｍｏｌ~（－１）·Ｌ，铜在０～１．０μｇ／１０ｍＬ的范围内服从比尔定津。无需分离掩蔽，本法可直接用于高纯铅中痕量铜的分析；操作简便迅速，准确度满意。文中还就抗坏血酸促进反应的机理进行了初步的讨论。     

我国南方某类稀土矿中铝的赋存状态

以改进的连续分级提取方法,分别以去离子水,４％（ＮＨ４）２ＳＯ４水溶液、０．２０ｍｏｌ．Ｌ＾－１ＨＣｌ溶液、０．２０ｍｏｌ．Ｌ＾－１ＮＨ２ＯＨ．ＨＣｌ｜２．０ｍｏｌ．Ｌ＾－１ＨＣｌ溶液,０．３３ｍｏｌ．Ｌ＾－１柠檬酸钠溶液和０．５０ｍｏｌ．Ｌ＾－１ＮａＯＨ溶液为撮取剂,将南方某类稀土矿中可提取的非昌态铝相应区分为：水溶态铝（Ｓｏｌ Ａｌ）。交换态铝（Ｅｘ Ａｌ）,吸 态无机羟基铝（Ｈｙ Ａｌ）导上     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

Annual Report analysis of Chinese rare earth-related listed companies in 2013

<正>Chinese rare earth-related listed companies have published their 2013 annual reports.It can be understood from their reports that production and operation activities of Chinese rare earth-related companies were still heavily affected by macro economy and industrial policies.They basically followed the steps of national economy.In 2013,world economy recovered slowly but the economy     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared     

矿用防爆轴流对旋主要通风机叶片ANSYS模态分析及应用

高效节能矿用防爆对旋主要通风机的叶片是主要通风机运行的关键部件,叶片在运行时不断受到气流的作用力,从而使叶片产生振动,当叶片振动的频率与叶片的固有频率接近时,容易产生共振从而导致叶片的断裂。一旦叶片断裂时,对主要通风机的安全运行产生致命的影响,从而导致矿山、化工等企业发生重大事故,将会产生不可估量的损失。基于有限元分析软件ANSYS,对高效节能矿用防爆轴流对旋主要通风机叶片进行模态分析及产生对应的六阶模态频率,对主要通风机叶片的运行频率、固有频率及产生的共振问题进行了原理分析,并且解决了叶片频率共振的问题,从而为主要通风机叶片结构设计提供理论依据,并对主要通风机叶片的安全运行提供保障。     

2013 NdFeB export analysis

<正>China totally exported nearly 24,000 tonsof NdFeB products during 201 3,including 18,825 tons of permanent magnet,valued USD 1.34 billion at an average price of 71.4 USD/kg;3,277 tons of NdFeB magnetic powder,valued USD 1 01 million at an average price of 30.9 USD/kg;1,334 tons of strip casting ribbon,with total export value of USD 74million at an average price of 55.3 USD/kg;and 586     

Market and recycling of NiMH battery

<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH     

China rare earth market review

正September 1-10,2014 Affected by the National Day holiday,rare earth transaction was stagnant and the market showed a weak steady state.As there was no good news for downstream market,some products with flat demand would likely rally slightly for some time to     

唐口煤矿深部复杂开采工作面瓦斯分源涌出规律研究

研究工作面瓦斯涌出规律对工作面瓦斯治理有重要意义。为了得到唐口煤矿深部3号煤层复杂开采条件下工作面回采时期瓦斯涌出时空演化规律,选取6304工作面作为对象,采用实测方法研究6304工作面瓦斯涌出规律。结果表明:6304工作面瓦斯涌出量为6.534 m³/min,其中煤壁占34.27%,落煤占29.62%,采空区占36.11%;沿工作面倾向由低到高,瓦斯浓度整体为上升趋势,其中1—76号架工作面瓦斯浓度小于0.20%,76—102号架瓦斯浓度上升明显,最大为0.387%;上隅角的后部采空区是工作面的瓦斯主要涌出源,上隅角1号测点瓦斯浓度0.78%,上隅角周边3号、5号、7号、8号、9号测点瓦斯浓度平均为0.643%;周期来压时,上隅角瓦斯相对平时较高。研究为针对性的瓦斯分源监控与灾害防治提供基础。